Photoprotective Role of Neoxanthin in Plants and Algae

Giossi, Chiara E.; Cartaxana, Paulo; Cruz, Sónia

doi:10.3390/molecules25204617

Cited by 35 publications

(20 citation statements)

References 106 publications

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“…The diadinoxanthin cycle includes interconversions of acetylenic (having one triple bond) xanthophylls. With excessive light, diadinoxanthin is converted to diatoxanthin, and with low light, the opposite reaction is observed [115,118,119].…”

Section: Production Of Carotenoids When Changing Light Intensitymentioning

confidence: 99%

“…Carotenoids play an important role in the photosynthesis processes of microalgae, as additional pigments, as well as in the mechanisms of photoprotection when exposed to high intensity light. Photoprotective mechanisms involving carotenoids in algae are quite diverse and have been discussed in detail in a number of recent works [67,70,115,116].…”

Section: Production Of Carotenoids When Changing Light Intensitymentioning

confidence: 99%

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Influence of Light Conditions on Microalgae Growth and Content of Lipids, Carotenoids, and Fatty Acid Composition

Maltsev

Maltseva

Kulikovskiy

et al. 2021

Biology

210

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Microalgae are a valuable natural resource for a variety of value-added products. The growth of microalgae is determined by the impact of many factors, but, from the point of view of the implementation of autotrophic growth, light is of primary importance. This work presents an overview of the influence of light conditions on the growth of microalgae, the content of lipids, carotenoids, and the composition of fatty acids in their biomass, taking into account parameters such as the intensity, duration of lighting, and use of rays of different spectral composition. The optimal light intensity for the growth of microalgae lies in the following range: 26−400 µmol photons m−2 s−1. An increase in light intensity leads to an activation of lipid synthesis. For maximum lipid productivity, various microalgae species and strains need lighting of different intensities: from 60 to 700 µmol photons m−2 s−1. Strong light preferentially increases the triacylglyceride content. The intensity of lighting has a regulating effect on the synthesis of fatty acids, carotenoids, including β-carotene, lutein and astaxanthin. In intense lighting conditions, saturated fatty acids usually accumulate, as well as monounsaturated ones, and the number of polyunsaturated fatty acids decreases. Red as well as blue LED lighting improves the biomass productivity of microalgae of various taxonomic groups. Changing the duration of the photoperiod, the use of pulsed light can stimulate microalgae growth, the production of lipids, and carotenoids. The simultaneous use of light and other stresses contributes to a stronger effect on the productivity of algae.

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Section: Production Of Carotenoids When Changing Light Intensitymentioning

confidence: 99%

Section: Production Of Carotenoids When Changing Light Intensitymentioning

confidence: 99%

Influence of Light Conditions on Microalgae Growth and Content of Lipids, Carotenoids, and Fatty Acid Composition

Maltsev

Maltseva

Kulikovskiy

et al. 2021

Biology

210

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“…PCA scores plot were performed using the complete phospholipids dataset (normalized XIC areas) while for heatmaps/clustering analysis the 25 molecular species that most contributed to differentiation between treatments were selected (PLS-DA vip). Holzwarth et al, 2009;Giossi et al, 2020). For these reasons, the rearrangement of the MGDG pool observed in our study could reflect significant changes happening in the thylakoid membrane environment of Bryopsidales, possibly influencing the interaction between pigment and proteins within the SCP.…”

Section: Pigment-lipid Interactions Within the Thylakoid Membranesmentioning

confidence: 66%

“…In most algae and plant taxawith the only exception of the ancient green alga lineages of Mesostigmatophyceae (Yoshii et al, 2003) and Bryopsidales (Qin et al, 2015)--the cis isomer of neoxanthin (c-Neo) represents the sole molecular form associated with antenna complexes, while t-Neo is not associated with light harvesting or photoprotection (Takaichi and Mimuro, 1998). Hence, the involvement of t-Neo in photoprotection could represent a unique mechanism of Bryopsidales (Giossi et al, 2020). The presence of such photoprotective activity could represent a safety valve for the dissipation of excess excitation energy under higher irradiances, particularly relevant for these algae that lack a functional xanthophyll cycle (Franklin et al, 1996;Raniello et al, 2004Raniello et al, , 2006Cruz et al, 2015;Christa et al, 2017;Giovagnetti et al, 2018), an important and ubiquitous photoprotection mechanism in aquatic and terrestrial oxygenic phototrophs (Latowski et al, 2011;Goss and Lepetit, 2015).…”

Section: Pigment Contribution To Excess Energy Regulationmentioning

confidence: 99%

Light Induced Changes in Pigment and Lipid Profiles of Bryopsidales Algae

et al. 2021

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Bryopsidales (Chlorophyta) are cultured and consumed in several regions of the planet and are known for their high nutritional value and bioprospection potential, due to a high content of relevant polar lipids and polysaccharides. Among other characteristic features, these marine algae are known for possessing unique photosynthetic pigment-protein complexes and for the absence (in nearly all species investigated) of a functional xanthophyll cycle, a ubiquitous photoprotection mechanism present in most algae and plants. With the aim of characterizing the photophysiology of this atypical group of algae, we investigated the changes in pigment content and polar lipidome of two Bryopsidales species (Codium tomentosum and Bryopsis plumosa) exposed for 7 days to low or high irradiance (20 vs. 1,000 μmol photons m–2 s–1). Our results show that high light has a strong effect on the pigment composition, triggering the time-dependent accumulation of all-trans-neoxanthin (t-Neo) and violaxanthin (Viola). High light-acclimated macroalgae also displayed a shift in the characteristic polar lipidome, including a trend of accumulation of lyso-glycolipids, and highly unsaturated phospholipids and betaine lipids. We hypothesize that the observed shifts on the lipid composition could promote the interaction between t-Neo and Viola with the siphonaxanthin–chlorophyll–protein complexes (SCP) of photosystem II (PSII) within the thylakoid membranes of the chloroplasts. Light induced changes in pigment and lipid composition could contribute to the fitness of Bryopsidales algae by reducing damages to the photosynthetic apparatus under increased irradiance.

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“…These contributions provide a comprehensive view of some of the most relevant compounds in photoprotection. Giossi et al explore the biological role of neoxanthin, a pigment found in plants and algae [ 8 ]. The review from Abiola and colleagues focuses on the use of ultrafast spectroscopy and computational methods to understand the photoprotective mechanism of some natural compounds [ 9 ].…”

mentioning

confidence: 99%